Comment by Bragaul

When we are affected by Marking Targets, our next arcane shot, multi-shot, or sidewinders (talented) will affect the target with Hunter's Mark.

Debuffing a target (or targets) with Hunter's Mark lets us use Marked Shot which sends out a shot to each marked target.

Comment by Casn

Note that while Marked Shot applies Vulnerable as soon as it's cast (without waiting for shot to reach target), it calculates damage even earlier, making it not benefit from debuff it itself applies (obviously unless there already was debuff on target).

Comment by elineo

When i look at that spell it says that it "stacks up to 1 times". and i am not the only one with that.where do the "3Stacks" come from the spell talks about?